CVE-2022-20114 : Exploit Details and Defense Strategies
Learn about CVE-2022-20114 affecting Android versions 10, 11, 12, and 12L. Understand the impact, exploitation, and mitigation of this local privilege escalation vulnerability.
Android system is vulnerable to a local escalation of privilege due to a permissions bypass in the TelecomManager.java code, allowing an application to run with foreground service importance without requiring additional execution privileges.
Understanding CVE-2022-20114
This vulnerability in Android impacts versions Android-10, Android-11, Android-12, and Android-12L. It falls under the problem type of Elevation of Privilege.
What is CVE-2022-20114?
CVE-2022-20114 allows a malicious application to maintain foreground service importance, potentially leading to local escalation of privilege without needing user interaction.
The Impact of CVE-2022-20114
The presence of this vulnerability could enable attackers to elevate their privileges on the Android operating system without any explicit user actions, posing a significant security risk.
Technical Details of CVE-2022-20114
The technical details of this CVE include:
Vulnerability Description
The issue lies in the placeCall function of TelecomManager.java, where applications can exploit a permissions bypass to retain foreground service importance.
Affected Systems and Versions
Android versions Android-10, Android-11, Android-12, and Android-12L are impacted by this vulnerability.
Exploitation Mechanism
By abusing the permissions bypass in the TelecomManager.java code, attackers can manipulate foreground service importance to achieve local privilege escalation.
Mitigation and Prevention
To address CVE-2022-20114, consider the following steps:
Immediate Steps to Take
- Update Android devices to the latest security patches provided by the vendor.
- Monitor for any unusual behavior or unauthorized foreground service activities.
Long-Term Security Practices
- Regularly update Android devices to ensure the latest security fixes are applied.
- Be cautious when granting permissions to applications.
Patching and Updates
Stay informed about security advisories from Google for prompt application of relevant patches and updates.